About the security content of watchOS 4

This document describes the security content of watchOS 4.

About Apple security updates

For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available. Recent releases are listed on the Apple security updates page.

Impact: Processing a malformed mach binary may lead to arbitrary code execution

Description: A memory corruption issue was addressed through improved validation.

CVE-2017-13834: Maxime Villard (m00nbsd)

Entry added November 10, 2017

Kernel

Available for: All Apple Watch models

Impact: A malicious application may be able to learn information about the presence and operation of other applications on the device.

Description: An application was able to access network activity information maintained by the operating system unrestricted. This issue was addressed by reducing the information available to third party applications.

CVE-2017-13873: Xiaokuan Zhang and Yinqian Zhang of The Ohio State University, Xueqiang Wang and XiaoFeng Wang of Indiana University Bloomington, and Xiaolong Bai of Tsinghua University

Entry added November 30, 2017

libarchive

Available for: All Apple Watch models

Impact: Unpacking a maliciously crafted archive may lead to arbitrary code execution

Impact: Malicious code executing on the Wi-Fi chip may be able to read restricted kernel memory

Description: A validation issue was addressed with improved input sanitization.

CVE-2017-7116: Gal Beniamini of Google Project Zero

zlib

Available for: All Apple Watch models

Impact: Multiple issues in zlib

Description: Multiple issues were addressed by updating to version 1.2.11.

CVE-2016-9840

CVE-2016-9841

CVE-2016-9842

CVE-2016-9843

Entry added September 25, 2017

Additional recognition

Security

We would like to acknowledge Abhinav Bansal of Zscaler, Inc. for their assistance.

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